Name the enzyme that facilitates the opening of the $DNA$ helix during transcription.

In prokaryotes, the transcription of $DNA$ is initiated with the help of

Which of the following statements are correct with reference to a transcription unit?
$A$. $A$ transcription unit in $DNA$ is defined primarily by three regions: promoter,structural gene and terminator.
$B$. The promoter is said to be located towards the $5'$-end of the structural gene.
$C$. The promoter is a $DNA$ sequence that provides binding site for $RNA$ polymerase.
$D$. The promoter defines the template and coding strands.
$E$. The terminator is located towards the $3'$-end of the coding strand and it defines the end of the process of transcription.
Choose the correct answer from the options given below:

Describe the process of transcription in eukaryotes.

Match List $I$ with List $II$:

List $I$	List $II$
$A$. $RNA$ polymerase $III$	$I$. snRNPs
$B$. Termination of transcription	$II$. Promoter
$C$. Splicing of exons	$III$. Rho factor
$D$. $TATA$ box	$IV$. snRNAs,tRNA

Choose the correct answer from the options given below:

If $RNA$ polymerase $III$ is removed from the nucleoplasm,which of the following will be affected?